Print error if return value of a notification is not null (#263)
Print error if return value of a notification is not null (#263)

google/xi-editor,fuchsia-mirror/third_party-xi-editor,google/xi-editor,fuchsia-mirror/third_party-xi-editor,google/xi-editor,google/xi-editor,modelorganism/xi-editor,modelorganism/xi-editor,fuchsia-mirror/third_party-xi-editor,fuchsia-mirror/third_party-xi-editor,modelorganism/xi-editor